bug fixed for sql parser. for issue #2544

src/main/java/com/alibaba/druid/sql/ast/expr/SQLMethodInvokeExpr.java

@@ -118,6 +118,13 @@ public class SQLMethodInvokeExpr extends SQLExprImpl implements SQLReplaceable,
         this.parameters.add(param);
     }
 
+    public void addArgument(SQLExpr arg) {
+        if (arg != null) {
+            arg.setParent(this);
+        }
+        this.parameters.add(arg);
+    }
+
     public void output(StringBuffer buf) {
         if (this.owner != null) {
             this.owner.output(buf);

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlExprParser.java

@@ -235,6 +235,13 @@ public class MySqlExprParser extends SQLExprParser {
                     lexer.nextToken();
                 } while (lexer.token() == Token.LITERAL_CHARS || lexer.token() == Token.LITERAL_ALIAS);
                 expr = new SQLCharExpr(text2);
+            } else if (expr instanceof SQLVariantRefExpr) {
+                SQLMethodInvokeExpr concat = new SQLMethodInvokeExpr("CONCAT");
+                concat.addArgument(expr);
+                concat.addArgument(this.primary());
+                expr = concat;
+
+                return primaryRest(expr);
             }
         } else if (lexer.token() == Token.IDENTIFIER) {
             if (expr instanceof SQLHexExpr) {

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -696,7 +696,11 @@ public class SQLExprParser extends SQLParser {
                 sqlExpr = unary;
                 break;
             case QUES:
-                lexer.nextToken();
+                if (JdbcConstants.MYSQL.equals(dbType)) {
+                    lexer.nextTokenValue();
+                } else {
+                    lexer.nextToken();
+                }
                 SQLVariantRefExpr quesVarRefExpr = new SQLVariantRefExpr("?");
                 quesVarRefExpr.setIndex(lexer.nextVarIndex());
                 sqlExpr = quesVarRefExpr;

src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_186.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 1999-2017 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.mysql.select;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+
+import java.util.List;
+
+public class MySqlSelectTest_186 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "select count(0) from (SELECT * FROM auth_tenant WHERE type = 'tenant' AND name LIKE ?\"%\") tmp_count";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+
+//        print(statementList);
+
+        assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        assertEquals(1, visitor.getTables().size());
+        assertEquals(3, visitor.getColumns().size());
+        assertEquals(2, visitor.getConditions().size());
+        assertEquals(0, visitor.getOrderByColumns().size());
+
+        assertTrue(visitor.containsTable("auth_tenant"));
+        assertTrue(visitor.containsColumn("auth_tenant", "name"));
+
+        String output = SQLUtils.toMySqlString(stmt);
+        assertEquals("SELECT COUNT(0)\n" +
+                        "FROM (\n" +
+                        "\tSELECT *\n" +
+                        "\tFROM auth_tenant\n" +
+                        "\tWHERE type = 'tenant'\n" +
+                        "\t\tAND name LIKE CONCAT(?, '%')\n" +
+                        ") tmp_count", //
+                            output);
+    }
+
+}